I have some questions related to Long War. I started a new campaign with LongWar and I am a bit confused.No matter what difficulty level I choose I always have nearly endless ammunition and always have 1shot 1 kill with always 100% aiming no matter if the Aliens hide behind a house or standing naked on the street (and my soldiers get upgraded after every mission).Do I have to change something in the setting?I already switched between the different levels but it never changes.

Sounds like you have a mod conflicting with or otherwise contaminating your game. Make triple sure that when you start a new campaign that there are no mod conflicts with LW2. I would turn every mod off except for LW2 and test a new campaign. That would be a quick and easy way to determine if this is indeed the case.